1、I 摘 要 本次设计的 220KV 枢纽降压变电所，将从经济性、可靠性以及灵活 性几方面予以选择主变压器、主接线方式、短路电流的计算及电气设备 的选择，并将安全性作为继电保护规划、配电装置的规划及防雷规划设 计的基本准则，同时还须兼顾经济性方面的考虑。 主接线的可靠性、经济性、灵活性较好。由于所设计的变电站是枢 纽变电站，全站停电后，将影响整个地区的供电，所以此变电站在设计 时，采用两台 OSFPSL-120000/2200 型变压器，满足了灵活性和可靠性。 220KV 侧 2 回架空线路，出于经济性和灵活性的考虑， 采用双母线接线形 式；110KV 侧 4 回架空线路，为了满足供电的可靠性，
2、采用了双母线带旁 路母线的接线形式；10KV 侧重要负荷较多，为 14 回电缆线路，出于可靠 性和经济性的考虑，则采用了单母线分段的接线形式。设备选择后，对 设备进行校验。 关键词：变电所；电气主接线；短路电流计算；设备选择校验； II Abstract Should design the some problem that discussed in design first 220 KV change to give or get an electric shock, include an electricity lord that changing and giving or get an
3、 electric shock the choice, short-circuit electric current calculation connects the line design, electricity equipments and press protection etc. problem with the research that conduct electricity after the electricity protection programming. The reliability、 economic and flexibility of the bus arra
4、ngement is well. This is a local electric substation. If the electric substation power cut, it will influence the whole area. So in the design of this electric substation use two transformers which model number is OSFPSL-120000/2200. So it can satisfy the flexibility and reliability. It doesnt take
5、load in the side of 220KV, so it uses double bus bar cord form in order to satisfy economy and reliability .There is much load in the side of 110KV. In order to satisfy the reliability of power supply, it uses double bus bars which have bypass bus bar cord form. There are much important load and it
6、take the load of this electric substation in the side of 10KV, considering the reliability and economy, it use single bus bar section card form .After the equipment be selected, it should be checked. Key words：substation ；the electrical bus arrangement ；the calculation of short circuit；equipment selection and check。 III 摘 要 . I AbstractAbstract II 绪论 . 1 0.1 引言 1 0.2 选题意义 . 1 0.3 国内外发展概况 . 1 第 1 章 设计要求及概述 . 3 1.1 原始资料 3 1.1.1 所在变电所建设规模 3 1.1.2 变电所与系统的连接情况 3 1.2 原始资料分析 . 3 1.2.1 变电所的性质、地理位置及自然
